12220487 has 4 divisors (see below), whose sum is σ = 12278616. Its totient is φ = 12162360.

The previous prime is 12220457. The next prime is 12220489. The reversal of 12220487 is 78402221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78402221 = 347 ⋅225943.

It is a cyclic number.

It is not a de Polignac number, because 12220487 - 2¹⁴ = 12204103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28748 + ... + 29169.

It is an arithmetic number, because the mean of its divisors is an integer number (3069654).

Almost surely, 2^12220487 is an apocalyptic number.

12220487 is a deficient number, since it is larger than the sum of its proper divisors (58129).

12220487 is an equidigital number, since it uses as much as digits as its factorization.

12220487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58128.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 12220487 is about 3495.7813146706. The cubic root of 12220487 is about 230.3365394663.

The spelling of 12220487 in words is "twelve million, two hundred twenty thousand, four hundred eighty-seven".